Silicon Calcium 58-30 – High-Purity Alloy for Advanced Steel Refining (Si≥58% / Ca≥30%)
Premium calcium silicon alloy with minimum 58% silicon and 30% calcium. Ideal for inclusion modification, desulfurization, and nodular iron production.
| Main Composition | Si ≥58.0%, Ca ≥30.0%, Fe balance, Al ≤1.2%, C ≤0.5% (typical impurities) |
| Form | Lumps (10-80mm), Granules (1-3mm, 3-15mm), Powder (0-2mm), Custom sizes, Cored wire (Ø9mm/13mm) |
| Application | Steelmaking (deoxidizer, desulfurizer, inclusion modification), nodulizer in ductile iron, calcium treatment |
| Standard | GB/T 2272-2020, ASTM A495, ISO 5445 |
Silicon Calcium 58-30 – Product Overview
Silicon Calcium 58-30 is a high-grade composite alloy containing minimum 58% silicon and 30% calcium. Produced in submerged arc furnaces, it offers enhanced calcium content for superior inclusion modification and desulfurization in steelmaking, as well as effective nodulizing in ductile iron foundries.
Product Core Advantages
- Elevated Calcium: ≥30% Ca ensures high calcium recovery and efficient modification of alumina inclusions.
- Low Impurities: Tightly controlled Al (≤1.5%) and C (≤0.8%) for predictable metallurgical reactions.
- Versatile Forms: Available in lumps, granules, powder, and cored wire for flexible addition methods.
- Consistent Quality: Every batch tested in ISO 17025 lab for guaranteed chemistry.
- Cost-Effective: Optimized composition for demanding steel grades.
Typical Application Areas
- Secondary Steelmaking: Calcium treatment for inclusion engineering in pipeline, automotive, and bearing steels.
- Ductile Iron: Magnesium-free nodulizer for producing high-quality spheroidal graphite iron.
- Foundry Inoculation: Improves graphite structure and mechanical properties in castings.
- Cored Wire: Precision feeding for calcium treatment in ladle furnaces.
For specific application guidance, contact our technical team for personalized recommendations.
Technical Specifications – Silicon Calcium Alloys
Our Silicon Calcium 58-30 meets international standards. Below is the chemical composition compared with common industrial grades.
Chemical Composition (Typical Values, % by weight)
| Grade / Designation | Si (%) | Ca (%) | Fe (%) | Al (%) | C (%) |
|---|---|---|---|---|---|
| SiCa 58-30 | ≥58.0 | ≥30.0 | Balance | ≤1.5 | ≤0.9 |
| SiCa 50-20 | ≥50.0 | ≥20.0 | Balance | ≤1.5 | ≤1.0 |
| SiCa 55-28 | ≥55.0 | ≥28.0 | Balance | ≤1.5 | ≤1.0 |
| SiCa 59-30 | ≥59.0 | ≥30.0 | Balance | ≤1.5 | ≤0.8 |
| SiCa 60-30 | ≥60.0 | ≥30.0 | Balance | ≤1.0 | ≤0.6 |
| SiCa 60-32 | ≥60.0 | ≥32.0 | Balance | ≤1.5 | ≤0.6 |
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Range | ~1200-1300 | °C |
| Density (at 20°C) | ~2.5-2.8 | g/cm³ |
| Appearance | Silvery-gray metallic lumps / granules | - |
| Bulk Density (lumps) | 1.8-2.2 | g/cm³ |
Available Sizes & Forms
- Lumps: 10-50mm(standard), 10-80mm, 30-100mm , custom sizes available
- Granules: 1-3mm, 3-15mm
- Powder: 0-2mm, 0-3mm,0.2-2mm,0-0.2mm
- Cored Wire: Ø13mm (steel sheath, SiCa powder filling), custom core weight
- Custom Sizes: Available upon request
Application Guidelines – Silicon Calcium 58-30
Steelmaking (Calcium Treatment)
Added via cored wire or ladle addition for inclusion modification: transforms Al₂O₃ into liquid calcium aluminates, preventing nozzle clogging and improving fatigue properties. Typical addition rates: 0.3-1.5 kg/ton steel.
Ductile Iron Nodulizer
Used in production of spheroidal graphite iron (SGI) as a magnesium-free nodulizer, particularly for heavy-section castings.
Desulfurization & Deoxidation
Effective for deep desulfurization (S levels below 0.005%) in secondary metallurgy.
Foundry Inoculant
Acts as late-stage inoculant to improve graphite morphology and reduce chill depth.
Packaging & Logistics – Silicon Calcium 58-30
Packaging Options
- 1‑ton Jumbo Bags: Standard for lumps/granules.
- 25kg / 50kg Bags: For smaller orders or foundries.
- Cored Wire Spools: 1000-1500kg spools, moisture-proof wrapped.
- Custom Packaging: Moisture-proof liners, wooden boxes, small drums.
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 20 metric tons (lumps/granules); 10 tons for cored wire (trial orders negotiable) |
| Lead Time | 15-25 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao) |
| Shipping Options | FOB, CIF, CFR, DAP |
| Payment Terms | T/T, L/C at sight |
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Frequently Asked Questions – Silicon Calcium 58-30
What is the advantage of 58-30 over 55-28?
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Higher calcium (≥30%) and lower impurities (Al, C) make 58-30 more efficient for inclusion modification, requiring lower addition rates for the same calcium recovery.
Is SiCa 58-30 suitable for cored wire?
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Yes, it is commonly supplied as powder (0-2mm) for cored wire production, offering precise calcium treatment.
What sizes are best for ladle additions?
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Lumps 10-80mm are typical for direct ladle addition; granules 1-5mm for continuous feeding.
Do you provide a certificate of analysis?
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Yes, every shipment includes a COA from our accredited lab.
What is your production capacity for SiCa 58-30?
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Annual capacity for all SiCa grades exceeds 30,000 metric tons.
Why Choose Our Silicon Calcium
20+ Years Experience
Specialized in ferroalloy production with deep industry knowledge
Strict Quality Control
Every batch tested to ensure consistent composition and performance
Global Delivery
Reliable logistics network ensuring timely delivery worldwide
Quality & Production Showcase
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Different Grades of CaSi Comparison
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